A fracture-resistant high-entropy alloy for cryogenic applications

TLDR

Metal alloys are typically composed of a dominant element with minor additions to enhance properties, and many alloys become stronger at lower temperatures. The study examined a high‑entropy alloy composed of equal parts chromium, manganese, iron, cobalt, and nickel. The alloy exhibited superior strength, ductility, and toughness, all of which increased at cryogenic temperatures where most alloys become brittle. Gludovatz et al., Science, issue p.1153.

Abstract

A metal alloy that is stronger when cold Metal alloys normally consist of one dominant element, with others in small amounts to improve specific properties. For example, stainless steel is primarily iron with nickel and chromium but may contain trace amounts of other elements. Gludovatz et al. explored the properties of a high-entropy alloy made from equal amounts of chromium, manganese, iron, cobalt, and nickel. Not only does this alloy show excellent strength, ductility, and toughness, but these properties improve at cryogenic temperatures where most alloys change from ductile to brittle. Science , this issue p. 1153